MATLAB: Code generation and class handle

classclass handlecode generationmatlab coder

I am using Matlab Coder and I got the following error : "In code generation, an existing instance of a handle class handle can only be assigned to a local variable or function ouput"

I got this error because I wanted to store as a class property a handle on another class. I wanted to do so to be able to keep a reference on a class for future use which is very classical …

Do you know a workaround ?

Best Answer

Currently in MATLAB Coder, handle objects can be assigned to class properties only in the constructor of the class. This restriction will be removed in future releases.

Related Solutions

MATLAB: How to get a handle to a public method inside a class in MATLAB 7.8 (R2009a)

Suppose you have class called 'class_a' defined as follows:

classdef class_a
      methods
          function display_message(obj)    % public method
              disp('Hello, there!')
          end
          function h = get_handle(obj)    % return handle to method 'display_message'
              h = @display_message;
          end
      end
end

To get a handle to the method 'display_message', execute the following code:

obj_a = class_a;
h = obj_a.get_handle;
h(obj_a);

MATLAB: Handles.

It depends on how it was defined:

handles.num = 15

Now "handles" is a struct containing the field "num", which has the value 15. But if your define "handles" as object, it could be something different.

So please take the time to investigate it yourself:

class(handles)
whos('handles')
methods(handles)

If I dare to guess, "handles = guidata(FigureHandle)" might be the creator of the struct "handles". If so, see "help guidata" for more details.

Best Answer

Related Solutions

MATLAB: How to get a handle to a public method inside a class in MATLAB 7.8 (R2009a)

MATLAB: Handles.

Related Question